The other answer giver, the one who calls himself Walter, unfortunately is not fit to give answers in this issue as he is not an inhabitant of Latvia and with his limited experience is unfit to give such answers. The biggest of Art universities is Art Academy of Latvia www.lma.lv/eng/index.php. Unfortunately here also my knowledge ends but I am sure there are also smaller colleges or isolated study programs which specialize in various aspects of art and design. Let Google be your friend!